Henderson County, KY Insulation Payback
Attic insulation payback for Henderson County, KY
Henderson County sits in IECC climate zone 4 (Mixed-Humid) — a genuine mix of cold winters and humid summers, with neither one dominating the bill. For a currently uninsulated attic, DOE and ENERGY STAR recommend building up to R-60. Topping up a typical 1,000-square-foot attic from bare joists (R-2) to R-60 runs an estimated $3,480, and saves about $1,406 a year in heating and cooling — a payback around 2.5 years. Hard to find a home improvement with a faster payback than this.
Heating vs. cooling in Henderson County
Of that, about $1,181/year comes from reduced heating and $224/year from reduced cooling load through the ceiling. Henderson County beats 46% of the counties in this 3,162-county dataset on estimated insulation savings. Among the 825 counties DOE places in zone 4, Henderson County ranks 378th. Against Kentucky's own average of $1,385/year, Henderson County runs 2% above that.
Where these numbers come from
NOAA's HENDERSON STATE POLICE, KY US station, 0.1 miles from Henderson County, supplies the 4,418 HDD and 1,396 CDD this estimate runs on. By total degree days, Henderson County sits at the 47th percentile nationally. DOE also classifies Henderson County as moisture regime A (humid) - ask a local contractor whether that changes the vapor-barrier approach for this job.
Already have some insulation?
Already have a few inches up there? Topping R-11 up to R-49 runs about $2,280 for about $205/year saved — roughly 11.1 years to break even. It is close - the payback only just fits a reasonable timeframe.
Quotes and materials for this job
Get more than one quote before committing. Attic access and any needed air sealing move the price around, and most contractors won't take a job below roughly $600 regardless of size - worth asking upfront given Henderson County's estimated $1,406/year on the line.
More on how this was built
Nothing here is a guess: the methodology guide names the DOE climate map and NOAA station data behind every number on this page. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.